JPH0739696A - Steam iron - Google Patents

Abstract

PURPOSE:To exclude the intermittent jetting of steam or the decrease of jetting quantity by smoothly circulating water inside a discharge pipe by providing a leading part of the discharge pipe with a narrow flow-out part having a cross-sectional area smaller than the cross-sectional area of the discharge pipe and letting water, which is sent from the pour port of a water feeding means into the discharge pipe, flow through a flow-out part to an evaporation chamber. CONSTITUTION:A suction part 31 of an electric pump 30 is connected to a flow-in part 12 of a water relay 9 and communicates with the inside of the flow-in part 12, and a discharge pipe 35 formed by a flexible heat resistant rubber is connected into a discharge port 32. At the intermediate part of the water relay 9, a flow-out part 36 composed of the through holes of a small diameter to be passed through vertically is formed, and the lower edge part of the narrow flow-out part 36 is arranged at an opening part on the upper face of an evaporation chamber 7. In this case, the cross-sectional area of the pour port 32 of the electric pump 30 is made almost the same as the cross-sectional area of the discharge pipe 35, and the cross-sectional area of the narrow flow-out part 36 is made enough smaller than that of the discharge pipe 35. Even when any bubble is interposed inside the discharge pipe 35, the bubble is pushed out of the discharge pipe 35 with the pressure of water to be circulated inside the narroe flow-out part 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam iron capable of ejecting steam from the lower surface of a base.

[0002]

2. Description of the Related Art As a steam iron of this type, a water supply means, for example, an electromagnetic electric pump is incorporated in an iron body, and the electric pump is driven to supply water into a vaporization chamber of the base. It is known that steam is vaporized by heat and the steam is spouted from the lower surface of the base.

The electric pump has a suction port and a discharge port,
The suction port communicates with the inside of the water tank through the water passage joint, and the discharge port communicates with the vaporization chamber through the drain pipe. Then, by the operation of the electric pump, the water stored in the water tank is sucked from the water passage joint through the suction port, and the water is supplied from the discharge port into the vaporization chamber through the discharge pipe.

[0004]

However, in the steam iron for supplying water into the vaporizing chamber by using the water supply means such as the electric pump, the steam spouts intermittently or the steam spouting amount is set. It may be less than the amount.

The cause of this is that air bubbles stay in the discharge pipe between the water supply means and the vaporization chamber. The water flowing through the water joint, the water supply means, and the discharge pipe is disturbed by the vibration caused by the operation when the iron is used and the vibration caused by the operation of the water supply means.
Further, bubbles are generated in the water under the influence of heat from the base heated by the heater. Then, the bubbles generated in the water joint and the water supply means are sent into the discharge pipe as the water supply means is driven.

Therefore, a relatively large amount of air bubbles intervene and stay in the discharge pipe, and the bubbles block the flow of water flowing in the discharge pipe. As a result, the supply of water into the vaporization chamber fluctuates and steam is generated. The amount of steam spouting in an intermittent state or the amount of steam spouting decreases below the set amount.

Further, since the flow of water flowing through the discharge pipe is obstructed, the water supply means may be overloaded and the performance and life of the water supply means may be reduced. The present invention has been made in view of such a point, and its purpose is to make the water discharged from the discharge port of the water supply means flow smoothly into the discharge pipe to intermittently spout or eject steam. It is an object of the present invention to provide a steam iron that can eliminate the problems of reduction in the amount and reduction in the performance and life of the water supply means.

[0008]

In order to achieve such an object, the present invention provides a water supply means having an intake port and a discharge port in an iron body, and the discharge port has a diameter equal to that of the water supply unit. A discharge pipe having substantially the same cross-sectional area is connected, and by driving the water supply means, water from the water tank is sucked through the suction port and discharged from the discharge port to be sent into the discharge pipe. In a steam iron that supplies steam into the vaporization chamber of the base through the discharge pipe to generate steam, a tip end portion of the discharge pipe is provided with a throttle outflow portion having a cross-sectional area smaller than the cross-sectional area of the discharge pipe, The water sent from the discharge port into the discharge pipe is made to flow out into the vaporization chamber through the throttle outflow portion.

[0009]

Since the cross-sectional area of the squeeze outflow portion is smaller than the cross-sectional area of the discharge pipe, the water flowing in the discharge pipe is squeezed by the squeeze outflow portion, and therefore the water sent into the discharge pipe from the discharge port of the water supply means. The pressure rises in the discharge pipe. Then, when this water flows through the squeezing outflow portion, the flow velocity thereof is rapidly increased.

Therefore, even if bubbles are present in the discharge pipe, the bubbles are pushed out of the discharge pipe through the throttle outflow part together with the water by the force of the water flowing in the throttle outflow part.
Therefore, the amount of bubbles remaining in the discharge pipe is reduced, and the water sent from the discharge port of the water supply means into the discharge pipe smoothly flows in the discharge pipe. For this reason, a fixed amount of water is supplied to the vaporization chamber one by one, intermittent discharge of steam and reduction of the spray amount of steam are prevented, and there is no excessive resistance due to smooth flow of water in the discharge pipe. As a result, the water supply means is not overloaded and its performance and life are prevented from being shortened.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows the entire structure of the steam iron, and FIG. 1 shows an enlarged structure of the essential parts thereof.
Reference numeral 1 is an iron body, and the iron body 1 is provided with a heat shield plate 3 on the upper surface of a base 2 formed of, for example, aluminum die casting, and the upper surface of the heat shield plate 3 is covered with a cover 4, and the cover 4 The handle 5 is attached to.

A heater 6 is cast in the base 2, and a vaporization chamber 7 is formed on the upper surface thereof, and the inside of the vaporization chamber 7 is passed through a steam ejection hole 8 provided on the lower surface of the base 2 to the lower surface side thereof. Is in communication with.

A water-permeable joint 9 is provided between the heat shield plate 3 and the cover 4, and an opening 10 is formed on the upper surface of the water-permeable joint 9 on one end side, and a push rod 11 is provided inside the opening 10. Is formed, and the upper end portion of the push rod 11 projects above the water through joint 9 through the opening 10. And this water joint 9
An inflow portion 12 that is located on the opposite side of the push rod 11 and communicates with the opening 10 is formed inside.

At the front of the iron body 1, for example, a water tank 16 of a cassette type is detachably provided. An outlet 17 and a valve mechanism 18 are provided at the bottom of the water tank 16, and the valve mechanism 18 has a disc-shaped valve body 2 at an intermediate portion of a valve rod 20 slidably supported by a support body 19.
1 is attached, and this valve body 21 is elastically biased via a spring 22 in the direction in which the outlet 17 is arranged, that is, in the direction of closing the outlet 17.

The outflow port 17 is the opening 10 of the water passage joint 9.
Liquid-tightly connected to, and in this state
Comes into contact with the valve rod 20 and pushes the valve body 21 upward against the spring 22, whereby the outlet 17 is held in an open state, and the water contained in the water tank 16 is opened from the outlet 17. It is designed to flow into the inflow portion 12 of the water through joint 9 through 10.

A water injection port 23 is formed in the upper portion of the front surface of the water tank 16, and a water injection lid 24 is provided in the water injection port 23. The water injection lid 24 is opened to enter the water tank 16 from the water injection port 23. Water can be appropriately injected.

An electromagnetic electric pump 30, for example, is provided above the water passage joint 9 as a water supply means. The electric pump 30 has a suction port 31 at the lower end and a discharge port 32 at the upper end and has an outer periphery. Is provided with an electromagnetic coil 33, and a plunger mechanism 34 is incorporated therein, and the plunger mechanism 34 is driven by the electromagnetic coil 33 to reciprocate up and down. The water is sucked and discharged from the discharge port 32.

The suction port 31 of the electric pump 30 is connected to the inflow part 12 of the water passage joint 9 and communicates with the inflow part 12, and the discharge port 32 is formed of flexible heat-resistant rubber. The discharge pipe 35 is connected.

A throttle outflow portion 36 consisting of a vertically small through hole is formed in the middle portion of the water passage joint 9, and the lower end portion of this throttle outflow portion 36 is an opening portion on the upper surface of the vaporization chamber 7. And is communicated with the inside of the vaporization chamber 7.

The discharge pipe 35 attached to the discharge port 32 of the electric pump 30 is curved in a substantially inverted U shape, and its tip end is connected to the upper end of the throttle outflow part 36. Communicate with the inside of the vaporization chamber 7 through the throttle outflow portion 36.

Here, the cross-sectional area of the discharge port 32 of the electric pump 30 and the cross-sectional area of the discharge pipe 35 are almost the same, and the throttle outflow portion 3
The sectional area of 6 is sufficiently smaller than the sectional area of the discharge pipe 35. The cross-sectional area of the inflow portion 12 of the water passage joint 9 is for preventing the temperature rise of the water due to the heat effect from the base 2 and for smoothly sucking the water into the suction port 31 of the electric pump 30. The cross-sectional area of the suction port 31 and the cross-sectional area of the discharge port 32 of the electric pump 30 are significantly larger.

In the steam iron thus constructed, the water contained in the water tank 16 is used as the water passage joint 9.
Of the water, the water is sequentially sucked into the electric pump 30 through the suction port 31 in response to the driving of the electric pump 30, and the water is sequentially sent into the discharge pipe 35 through the discharge port 32. And this water circulates in the discharge pipe 35,
The water is supplied into the vaporization chamber 7 through the squeeze outflow portion 36, the water is vaporized by the heat of the base 2 and becomes steam, and the steam is sequentially ejected from the steam ejection holes 8.

The cross-sectional area of the squeeze outflow portion 36 is sufficiently smaller than the cross-sectional area of the discharge pipe 35, so that the water flowing in the discharge pipe 35 is squeezed by the squeeze outflow portion 36, so that the discharge pipe from the electric pump 30 is discharged. The pressure of the water sent into 35 rises in the discharge pipe 35. And this water is squeezed out
When flowing through 6, the flow velocity is rapidly increased.

Therefore, even if bubbles are present in the discharge pipe 35, the bubbles are pushed out of the discharge pipe 35 through the throttle outflow part 36 together with the water by the force of the water flowing in the throttle outflow part 36.

Therefore, the amount of bubbles staying in the discharge pipe 35 is reduced, and the discharge pipe 3 is discharged from the discharge port 32 of the electric pump 30.
The water sent into 5 smoothly flows through this discharge pipe 35. For this reason, a fixed amount of water is successively supplied to the vaporization chamber 7,
Intermittent jetting of steam and reduction of the jetting amount of steam are prevented, and water does not flow smoothly in the discharge pipe 35 to cause excessive resistance, so that the electric pump 30 is overloaded. And the deterioration of its performance and life is prevented.

In the above embodiment, the electromagnetic type electric pump is used as the water supply means. However, for example, a centrifugal type electric pump other than the electromagnetic type may be used, and further an electromagnetic valve may be used. is there.

[0027]

As described above, according to the present invention,
Bubbles in the discharge pipe can be reduced, and water can be smoothly circulated in the discharge pipe. Therefore, it is possible to constantly supply a fixed amount of water into the vaporization chamber and prevent intermittent ejection of steam or reduction of the ejection amount. Since the water discharged from the water supply means can be smoothly circulated in the discharge pipe, the water supply means is not overloaded and its performance and life can be prevented from being shortened.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a steam iron according to an embodiment of the present invention.

FIG. 2 is a sectional view of the entire steam iron.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Iron main body 2 ... Base 7 ... Vaporization chamber 16 ... Water tank 30 ... Electric pump (water supply means) 31 ... Suction port 32 ... Discharge port 35 ... Discharge pipe 36 ... Throttle outflow part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroaki Sakai, 2570, Gosuda, Kamo-shi, Niigata 1 2570, Toshiba Home Techno Co., Ltd. Incorporated (72) Inventor Tetsuya Imai 2570 Gosuda, Kamo City, Niigata Prefecture 1570 Toshiba Home Techno Co., Ltd. (72) Inventor Isharu Tsubaki 2570 Gosuda, Kamo City, Niigata Prefecture 1 Toshiba Home Techno Co., Ltd.

Claims (1)

[Claims] 1. A water supply means having an intake port and a discharge port is provided in an iron body, and a discharge pipe having a cross-sectional area approximately the same as the diameter of the discharge port is connected to the discharge port to connect the water supply unit. By driving, the water from the water tank is sucked through the suction port, discharged from the discharge port and sent into the discharge pipe, and the water is supplied into the vaporization chamber of the base through the discharge pipe to generate steam. In the iron, a throttle outflow portion having a cross-sectional area smaller than the cross-sectional area of the discharge pipe is provided at the tip end portion of the discharge pipe, and water sent from the discharge port of the water supply means into the discharge pipe is passed through the throttle outflow portion to A steam iron characterized by being discharged into the vaporizing chamber.